I get what he means. If you change something you believe to be inconsequential, your tests will ensure that. However, if you update a function and change its output and forget to fix a particular function, tests will make your mistakes evident.
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I get what he means. If you change something you believe to be inconsequential, your tests will ensure that. However, if you update a function and change its output and forget to fix a particular function, tests will make your mistakes evident.